Pump-plunger.



H. MEAD. PUMP PLUNGER.

APPLICATION rum) 1111.11. 1911.

Patented May 16, 1911.

WITNESSES 72441; W

mokusrs UNITED STATES PATENT OFFICE.

HARRY MEAD, F COALINGA, CALIFORNIA, ASSIGNOR OF ONE-HALF T0 BURNS A.

- STEWART, OF COALINGA, CALIFORNIA.

PU P-PL NGER.

To all whom it my concern:

Be it known that I, HARRY MEAD, a citizen of the United States, and a-resident of Coalinga, in the county of Fresno and State of California, have invented a new andImproved Pump-Plunger, of whichthe following drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 1s a perspective viewof a plunger constructed in accordance with my in; vention, part of the babbitt jacket being re-.

moved; Fig. 2 is a central vertical section of the plunger; and Fig. 3 is a cross section of the same on the line 3+3 of Fig. 2'.

In accordance with my invention, the plunger .is made of a steel tube 5 of a suitable length, which tube is internally threaded at each end for the proper-connections, and is turned off exteriorly to reduce the diameter of the body portion between the threaded ends, with the reduced portion formed with a dove-tailed shoulder 6 at each end. The reduced portion of the plunger body is provided with a number of small openings 7 near each end and at intermediate points. About the body of the reduced portion of the plunger is applied a jacket 8 of Babbitt metal, the jacket when completed being slightly larger in diameter than the maximum diameterof the unreduced ends, and having lugs 9 entering into, but loosely fitting, the openings 7 To apply this'jacket tothe steel tube, the latter is filled with sand and placed in a mold, into which is run or poured Babbitt metal. This metal shrinks enough in the holes to allow the pressure of the oil inside the barrel to expand the babbitt and take up part of the wear. The plunger is designed for use in a cast iron barrel with common ball and seat valves Specification of Letters Patent. Patented ltIay 16, 1911.

Application filed January 17, 1911.

Serial No. 603,040.

at each end, and is employed primarily for pumping oil 1 which is heavy with sand. When thus used, the babbitt being softer than the cast iron barrel will wear quicker and preserve the life of this part of the pump. The babbitt is very easily renewed, and the usefulness of the pump appliedin this manner is indefinitely prolonged.

By the term Babbitt-metal as above employed, I mean any of the alloys or metal-- lic composition used under this term or as equivalents for the so-called Babbitt-metal.

I do not limit myself in every instance to the employment of Babbitt metal, as other metallic substitutes may be employed with substantially the same-result.

,Having thus described my invention, I claim as new and desire to secure by Letters- Patent:

1. A pump plunger for oil wells, comprising a tube having openings passing through the wall of the body thereof, and a babbitt jacket about the body of the tube, having lugs passing into and relatively loose in said openings, whereby the oil under pressure within the plunger is adapted to expand the jacket to take up wear.

2. In a pump plunger, a plunger tube provided with openings, a jacket surrounding the tube constitutinga bearing for the plunger, and expansibleby the pressure within the tube, the jacket being provided with lugs loosely engaging the said openings.

3. In a'pump plunger, a plunger tube having openings passing through the walls thereof, and a babbitt jacket arranged about the tube and adapted to be expanded by the pressure within the tube through the said openings, the jacket being rovided with lugs loosely engaging the said openings in the tube.

4. In a pump plunger, a plunger tube'internally threaded at each endand haying an externally reduced body portion provided with openings, the shoulders at the ends of the reduced body portion of the tube being undercut, and a babbitt jacket surrounding the reduced portion of the plunger tube and constitutinga bearing for the plunger, and having lugs loosely passing into the said openings.

5. A pump plunger for oil wells, con1prising a tube having 0 enings passing through the wall of the body-thereof, and a jacket disposed about the body of "the tube and name to this specification in the presence of made of metallic composition, said jacket two subscribing witnesses.

having lugs extending into and relatively loose within said openings whereby oil HARRY MEAD 5 under pressure within the plunger is adapt- Vitnesses:

ed to expand said jacket and take up Wear. LOUIS GEORGE,

In testimony whereof I have signed my HERBERT S. PIERCE. 

